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Method for controlling damping force in an electronically-controlled suspension apparatus

a technology of electronic control and suspension apparatus, which is applied in the direction of shock absorbers, instruments, cycle equipment, etc., can solve the problems of deterioration of ride comfort, poor response characteristics, and vehicle deterioration, so as to prevent vehicle deterioration and reduce the effect of response characteristics

Inactive Publication Date: 2005-04-21
HL MANDO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030] It is, therefore, an object of the present invention to provide a method for controlling damping force in an electronically-controlled suspension apparatus, which determines either appropriate damping force or an appropriate damping force mode using not only the number of acceleration signal edges exceeding a threshold value, but also a hold time for maintaining road surface condition judgment in the case where the road surface judgment is made to control damping force of a variable damper while driving, such that it establishes rapid response characteristics due to a lowered threshold value, and prevents ride comfort of a vehicle from being deteriorated due to a relatively-long hard mode maintenance of a damping force.

Problems solved by technology

Therefore, the movement of the vehicle is unnatural, resulting in deteriorated ride comfort of the vehicle.
Therefore, the response characteristics become poor.
Therefore, the ride comfort deterioration caused by the hard mode maintenance of the damping force may occur.

Method used

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  • Method for controlling damping force in an electronically-controlled suspension apparatus
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  • Method for controlling damping force in an electronically-controlled suspension apparatus

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Embodiment Construction

[0043] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Referring to FIG. 8, there is provided a flow chart illustrating a damping force control method for use in an electronically-controlled suspension apparatus in accordance with the present invention.

[0045] Prior to describing the present invention, several terms are defined as follows:

[0046] A road surface judgment allowance “ON” state indicates a state in which a judgment on a road surface can be made, i.e., a road surface judgment allowance state. A road surface judgment allowance “OFF” state indicates a state in which the judgment on the road surface is not made, i.e., a road surface judgment disallowance state. A road surface 1 indicates a bad road surface when the road surface is judged to be one of a bad and a good road surface. More specifically, the road surface 1“ON” state indicates a first case in which the road surface is judged to be ...

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Abstract

A method for controlling damping force in an electronically-controlled suspension apparatus on the basis of a judgment reference value for judging a road surface during a vehicle driving time uses a comparison of the judgment reference value with a predetermined threshold value. And the road surface is judged according to a result of the comparison. Then, the damping force is controlled in response to the road surface judgment. The road surface judgment is maintained for a predetermined road surface judgment maintenance time.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for controlling damping force in an electronically-controlled suspension apparatus; and more particularly, to a method for controlling damping force in an electronically-controlled suspension apparatus, which determines appropriate damping force using not only the number of acceleration signal edges exceeding a threshold value, but also a hold time for maintaining a road surface judgment in the case where the road surface is judged to control the damping force during vehicle's driving. BACKGROUND OF THE INVENTION [0002] In general, a suspension apparatus connects a wheel axle to a vehicle body to prevent vibration and impact transmitted from the wheel axle from being directly transmitted to the vehicle body, such that it prevents a vehicle body and goods contained therein from being damaged and improves ride comfort of the vehicle. Also, the suspension apparatus transfers to the vehicle body either driving force...

Claims

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Application Information

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IPC IPC(8): B60G17/015B60G17/00B60G17/0165B60G17/08F16F9/46F16F9/50F16F15/02
CPCB60G17/0152B60G17/0165B60G17/08B60G2400/206B60G2400/821B60G2400/91F16F9/46B60G2600/02B60G2600/184B60G2800/162B60G2800/702B60G2800/916B60G2500/10B60G2300/07B60G17/00
Inventor KIM, WANIL
Owner HL MANDO CORP
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